A seasonal joke

A driver is stuck in a traffic jam going into Central London. Nothing is moving north or south.

Suddenly a man knocks on his window. The driver rolls t idown his window and asks, 'What's happened, what's the hold up?'

“Terrorists have kidnapped Gordon Brown and Alistair Darling. They’re asking for a £10 million ransom.

Otherwise, they are going to douse them with petrol and set them on fire. We are going from car to car taking up a collection.”

The driver asks, “On average, how much is everyone giving?”
“About 2 litres”.